$ sudo apt-get install --reinstall python2.7
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  g++-4.8 gcc-4.8-base:i386 gcj-4.8-jre-lib libass4 libbaloocore4 libbaloofiles4 libbalooxapian4 libboost-date-time1.54.0 libcamel-1.2-45 libdvbpsi8 libepub0 libgcj14
  libgnutls26:i386 libgnutls28 libgsoap4 libidl-common libjpeg-progs libjpeg-turbo-progs libjs-codemirror libjs-jquery-cookie libjs-jquery-event-drag libjs-jquery-metadata
  libjs-jquery-mousewheel libjs-jquery-tablesorter libjs-jquery-ui libkactivities-models1 libkidletime4 libllvm3.4 libllvm3.4:i386 libnepomukcleaner4 libnepomukcore4abi1
  liboil0.3 libpoppler-qt4-4 libpoppler44 libqmi-glib0 libqmobipocket1 libqt5webkit5-qmlwebkitplugin libsoprano4 libssh2-1 libstdc++-4.8-dev libtar0 libzip2
  linux-headers-3.13.0-37 linux-headers-3.13.0-37-generic linux-headers-3.13.0-39 linux-headers-3.13.0-39-generic linux-image-3.13.0-37-generic linux-image-3.13.0-39-generic
  linux-image-extra-3.13.0-37-generic linux-image-extra-3.13.0-39-generic nepomuk-core-data nepomuk-core-runtime python-ibus qtdeclarative5-privatewidgets-plugin
  qtdeclarative5-ubuntu-ui-extras-browser-plugin-assets shared-desktop-ontologies soprano-daemon syslinux-themes-debian syslinux-themes-debian-wheezy virtuoso-minimal
  vlc-plugin-pulse xscreensaver-data
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
17 not fully installed or removed.
Need to get 0 B/204 kB of archives.
After this operation, 0 B of additional disk space will be used.
Selecting previously unselected package python2.7.
(Reading database ... 331873 files and directories currently installed.)
Preparing to unpack .../python2.7_2.7.8-10ubuntu1_amd64.deb ...
Unpacking python2.7 (2.7.8-10ubuntu1) over (2.7.8-10ubuntu1) ...
Processing triggers for menu (2.1.47ubuntu1) ...
Processing triggers for bamfdaemon (0.5.1+14.10.20140925-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for desktop-file-utils (0.22-1ubuntu2) ...
Processing triggers for mime-support (3.55ubuntu1) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...
Processing triggers for man-db (2.7.0.2-2) ...
Setting up gconf2 (3.2.6-2ubuntu1) ...
Traceback (most recent call last):
  File "/usr/sbin/gconf-schemas", line 8, in <module>
    import sys,os,os.path,shutil,tempfile,subprocess,re
  File "/usr/lib/python2.7/tempfile.py", line 35, in <module>
    from random import Random as _Random
  File "/usr/lib/python2.7/random.py", line 49, in <module>
    import hashlib as _hashlib
  File "/usr/local/lib/python2.7/dist-packages/hashlib-20081119-py2.7-linux-x86_64.egg/hashlib.py", line 115, in <module>
    f()
TypeError: 'frozenset' object is not callable
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python2.7/dist-packages/apport/__init__.py", line 5, in <module>
    from apport.report import Report
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 12, in <module>
    import subprocess, tempfNo apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                                                      No apport report written because the error message indicates its a followup error from a previous failure.
                                                               No apport report written because MaxReports is reached already
                                                                                                                             No apport report written because MaxReports is reached already
          No apport report written because MaxReports is reached already
                                                                        No apport report written because MaxReports is reached already
                                                                                                                                      No apport report written because MaxReports is reached already
                   No apport report written because MaxReports is reached already
                                                                                 No apport report written because MaxReports is reached already
                                                                                                                                               No apport report written because MaxReports is reached already
                            No apport report written because MaxReports is reached already
                                                                                          ile, os.path, re, pwd, grp, os, time
  File "/usr/lib/python2.7/tempfile.py", line 35, in <module>
    from random import Random as _Random
  File "/usr/lib/python2.7/random.py", line 49, in <module>
    import hashlib as _hashlib
  File "/usr/local/lib/python2.7/dist-packages/hashlib-20081119-py2.7-linux-x86_64.egg/hashlib.py", line 115, in <module>
    f()
TypeError: 'frozenset' object is not callable

Original exception was:
Traceback (most recent call last):
  File "/usr/sbin/gconf-schemas", line 8, in <module>
    import sys,os,os.path,shutil,tempfile,subprocess,re
  File "/usr/lib/python2.7/tempfile.py", line 35, in <module>
    from random import Random as _Random
  File "/usr/lib/python2.7/random.py", line 49, in <module>
    import hashlib as _hashlib
  File "/usr/local/lib/python2.7/dist-packages/hashlib-20081119-py2.7-linux-x86_64.egg/hashlib.py", line 115, in <module>
    f()
TypeError: 'frozenset' object is not callable
dpkg: error processing package gconf2 (--configure):
 suNo apport report written because MaxReports is reached already
                                                                 No apport report written because MaxReports is reached already
                                                                                                                               No apport report written because MaxReports is reached already
            No apport report written because MaxReports is reached already
                                                                          No apport report written because MaxReports is reached already
                                                                                                                                        bprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of libgnomevfs2-common:
 libgnomevfs2-common depends on gconf2 (>= 2.28.1-2); however:
  Package gconf2 is not configured yet.

dpkg: error processing package libgnomevfs2-common (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libgnomevfs2-0:amd64:
 libgnomevfs2-0:amd64 depends on libgnomevfs2-common (= 1:2.24.4-6ubuntu1); however:
  Package libgnomevfs2-common is not configured yet.

dpkg: error processing package libgnomevfs2-0:amd64 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of aisleriot:
 aisleriot depends on gconf2 (>= 2.28.1-2); however:
  Package gconf2 is not configured yet.

dpkg: error processing package aisleriot (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of compiz-gnome:
 compiz-gnome depends on gconf2 (>= 2.28.1-2); however:
  Package gconf2 is not configured yet.

dpkg: error processing package compiz-gnome (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of compiz:
 compiz depends on compiz-gnome; however:
  Package compiz-gnome is not configured yet.

dpkg: error processing package compiz (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of inkscape:
 inkscape depends on libgnomevfs2-0 (>= 1:2.17.90); however:
  Package libgnomevfs2-0:amd64 is not configured yet.

dpkg: error processing package inkscape (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libgksu2-0:
 libgksu2-0 depends on gconf2 (>= 2.28.1-2); however:
  Package gconf2 is not configured yet.

dpkg: error processing package libgksu2-0 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libgnomevfs2-extra:amd64:
 libgnomevfs2-extra:amd64 depends on libgnomevfs2-0 (>= 1:2.17.90); however:
  Package libgnomevfs2-0:amd64 is not configured yet.
 libgnomevfs2-extra:amd64 depends on libgnomevfs2-common (= 1:2.24.4-6ubuntu1); however:
  Package libgnomevfs2-common is not configured yet.

dpkg: error processing package libgnomevfs2-extra:amd64 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-gnome:
 libreoffice-gnome depends on gconf2; however:
  Package gconf2 is not configured yet.

dpkg: error processing package libreoffice-gnome (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of terminator:
 terminator depends on gconf2; however:
  Package gconf2 is not configured yet.

dpkg: error processing package terminator (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of transmission-gtk:
 transmission-gtk depends on gconf2 (>= 2.28.1-2); however:
  Package gconf2 is not configured yet.

dpkg: error processing package transmission-gtk (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of unity:
 unity depends on compiz; however:
  Package compiz is not configured yet.

dpkg: error processing package unity (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of ubuntu-desktop:
 ubuntu-desktop depends on unity; however:
  Package unity is not configured yet.

dpkg: error processing package ubuntu-desktop (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of unity-tweak-tool:
 unity-tweak-tool depends on unity (>= 6.8); however:
  Package unity is not configured yet.

dpkg: error processing package unity-tweak-tool (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of xchat-common:
 xchat-common depends on gconf2 (>= 2.28.1-2); however:
  Package gconf2 is not configured yet.

dpkg: error processing package xchat-common (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of xchat:
 xchat depends on xchat-common (= 2.8.8-7.1ubuntu7); however:
  Package xchat-common is not configured yet.

dpkg: error processing package xchat (--configure):
 dependency problems - leaving unconfigured
Setting up python2.7 (2.7.8-10ubuntu1) ...
Processing triggers for menu (2.1.47ubuntu1) ...
Errors were encountered while processing:
 gconf2
 libgnomevfs2-common
 libgnomevfs2-0:amd64
 aisleriot
 compiz-gnome
 compiz
 inkscape
 libgksu2-0
 libgnomevfs2-extra:amd64
 libreoffice-gnome
 terminator
 transmission-gtk
 unity
 ubuntu-desktop
 unity-tweak-tool
 xchat-common
 xchat
E: Sub-process /usr/bin/dpkg returned an error code (1)